Rock Lake
Rock Lake is an earth dam located in Platte County, Wyoming, built in 1930. It carries a Low hazard potential classification and has a fair condition assessment.
About Rock Lake
The primary purpose of Rock Lake is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wheatland Irrigation District (private). It impounds the North Wheatland Creek near Wheatland.
The dam stands 15 feet tall and stretches 660 feet across, creates a reservoir covering 37 acres, and has a maximum storage capacity of 334 acre-feet. Completed in 1930, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 08/05/2025.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Platte |
| Nearest City | Wheatland |
| River/Stream | North Wheatland Creek |
| Coordinates | 41.98722, -105.02556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 660 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 334 acre-ft |
| Max Storage | 334 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 37 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WHEATLAND IRRIGATION DISTRICT |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/05/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00033 |
| Federal ID | WY00033 |
| More Info | State Dam Safety Program |